package cn.com.kh;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;

public class JsonPluginsUtil {

    /**
     * 从一个JSON 对象字符格式中得到一个java对象
     *
     * @param jsonString
     * @param beanCalss
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> T jsonToBean(String jsonString, Class<T> beanCalss) {

        JSONObject jsonObject = JSONObject.fromObject(jsonString);
        T bean = (T) JSONObject.toBean(jsonObject, beanCalss);

        return bean;

    }

    /**
     * 将java对象转换成json字符串
     *
     * @param bean
     * @return
     */
    public static String beanToJson(Object bean) {

        JSONObject json = JSONObject.fromObject(bean);

        return json.toString();

    }

    /**
     * 将java对象转换成json字符串
     *
     * @param bean
     * @return
     */
    public static String beanToJson(Object bean, String[] _nory_changes, boolean nory) {

        JSONObject json = null;

        if (nory) {// 转换_nory_changes里的属性

            Field[] fields = bean.getClass().getDeclaredFields();
            String str = "";
            for (Field field : fields) {
                // System.out.println(field.getName());
                str += (":" + field.getName());
            }
            fields = bean.getClass().getSuperclass().getDeclaredFields();
            for (Field field : fields) {
                // System.out.println(field.getName());
                str += (":" + field.getName());
            }
            str += ":";
            for (String s : _nory_changes) {
                str = str.replace(":" + s + ":", ":");
            }
            json = JSONObject.fromObject(bean, configJson(str.split(":")));

        } else {// 转换除了_nory_changes里的属性

            json = JSONObject.fromObject(bean, configJson(_nory_changes));
        }

        return json.toString();

    }

    private static JsonConfig configJson(String[] excludes) {

        JsonConfig jsonConfig = new JsonConfig();

        jsonConfig.setExcludes(excludes);
        jsonConfig.setIgnoreDefaultExcludes(false);
        return jsonConfig;

    }

    /**
     * 将java对象List集合转换成json字符串
     *
     * @param beans
     * @return
     */
    public static String beanListToJson(List<?> beans) {

        StringBuffer rest = new StringBuffer();

        rest.append("[");

        int size = beans.size();

        for (int i = 0; i < size; i++) {

            rest.append(beanToJson(beans.get(i)) + ((i < size - 1) ? "," : ""));

        }

        rest.append("]");

        return rest.toString();

    }

    /**
     * @param beans
     * @param _no_changes
     * @return
     */
    public static String beanListToJson(List<?> beans, String[] _nory_changes, boolean nory) {

        StringBuffer rest = new StringBuffer();

        rest.append("[");

        int size = beans.size();

        for (int i = 0; i < size; i++) {
            try {
                rest.append(beanToJson(beans.get(i), _nory_changes, nory));
                if (i < size - 1) {
                    rest.append(",");
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        rest.append("]");

        return rest.toString();

    }

    /**
     * 从json HASH表达式中获取一个map，改map支持嵌套功能
     *
     * @param jsonString
     * @return
     */
    public static HashMap<Object, Object> jsonToMap(String jsonString) {

        JSONObject jsonObject = JSONObject.fromObject(jsonString);
        Iterator<?> keyIter = jsonObject.keys();
        String key;
        Object value;
        HashMap<Object, Object> valueMap = new HashMap<Object, Object>();

        while (keyIter.hasNext()) {

            key = (String) keyIter.next();
            value = jsonObject.get(key).toString();
            valueMap.put(key, value);

        }

        return valueMap;
    }

    /**
     * map集合转换成json格式数据
     *
     * @param map
     * @return
     */
    public static String mapToJson(Map<String, ?> map, String[] _nory_changes, boolean nory) {

        String s_json = "{";

        Set<String> key = map.keySet();
        for (Iterator<?> it = key.iterator(); it.hasNext(); ) {
            String s = (String) it.next();
            if (map.get(s) == null) {

            } else if (map.get(s) instanceof List<?>) {
                s_json += (s + ":" + JsonPluginsUtil.beanListToJson((List<?>) map.get(s), _nory_changes, nory));

            } else {
                JSONObject json = JSONObject.fromObject(map);
                s_json += (s + ":" + json.toString());
                ;
            }

            if (it.hasNext()) {
                s_json += ",";
            }
        }

        s_json += "}";
        return s_json;
    }

    /**
     * 从json数组中得到相应java数组
     *
     * @param jsonString
     * @return
     */
    public static Object[] jsonToObjectArray(String jsonString) {

        JSONArray jsonArray = JSONArray.fromObject(jsonString);

        return jsonArray.toArray();

    }

    public static String listToJson(List<?> list) {

        JSONArray jsonArray = JSONArray.fromObject(list);

        return jsonArray.toString();

    }

    /**
     * 从json对象集合表达式中得到一个java对象列表
     *
     * @param jsonString
     * @param beanClass
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> List<T> jsonToBeanList(String jsonString, Class<T> beanClass) {

        JSONArray jsonArray = JSONArray.fromObject(jsonString);
        JSONObject jsonObject;
        T bean;
        int size = jsonArray.size();
        List<T> list = new ArrayList<T>(size);

        for (int i = 0; i < size; i++) {

            jsonObject = jsonArray.getJSONObject(i);
            bean = (T) JSONObject.toBean(jsonObject, beanClass);
            list.add(bean);

        }

        return list;

    }

    /**
     * 从json数组中解析出java字符串数组
     *
     * @param jsonString
     * @return
     */
    public static String[] jsonToStringArray(String jsonString) {

        JSONArray jsonArray = JSONArray.fromObject(jsonString);
        String[] stringArray = new String[jsonArray.size()];
        int size = jsonArray.size();

        for (int i = 0; i < size; i++) {

            stringArray[i] = jsonArray.getString(i);

        }

        return stringArray;
    }

    /**
     * 从json数组中解析出javaLong型对象数组
     *
     * @param jsonString
     * @return
     */
    public static Long[] jsonToLongArray(String jsonString) {

        JSONArray jsonArray = JSONArray.fromObject(jsonString);
        int size = jsonArray.size();
        Long[] longArray = new Long[size];

        for (int i = 0; i < size; i++) {

            longArray[i] = jsonArray.getLong(i);

        }

        return longArray;

    }

    /**
     * 从json数组中解析出java Integer型对象数组
     *
     * @param jsonString
     * @return
     */
    public static Integer[] jsonToIntegerArray(String jsonString) {

        JSONArray jsonArray = JSONArray.fromObject(jsonString);
        int size = jsonArray.size();
        Integer[] integerArray = new Integer[size];

        for (int i = 0; i < size; i++) {

            integerArray[i] = jsonArray.getInt(i);

        }

        return integerArray;

    }

    /**
     * 从json数组中解析出java Double型对象数组
     *
     * @param jsonString
     * @return
     */
    public static Double[] jsonToDoubleArray(String jsonString) {

        JSONArray jsonArray = JSONArray.fromObject(jsonString);
        int size = jsonArray.size();
        Double[] doubleArray = new Double[size];

        for (int i = 0; i < size; i++) {

            doubleArray[i] = jsonArray.getDouble(i);

        }

        return doubleArray;

    }

}